WatchKnow-has great videos on computer related subjects, and many core curriculum subjects.
http://www.watchknow.org/

NeoK12: "Educational Videos, Lessons, & Games for K-12 School Kids"
http://www.neok12.com/

Kids Know IT: "The totally free children's learning network"
http://www.kidsknowit.com/interactive-educational-movies/index.php

Sqooltools: Videos for younger children--lots of ads, though.
http://www.sqooltools.com/edvideos/index.html

PBS kids videos-related to PBS shows--for younger kids.
http://pbskids.org/video/

TeacherTube: Videos for teachers
http://www.teachertube.com/

How to Use Movie Maker
http://open.byu.edu/ipt287/general-tools/movie-making/tutorial-using-moviemaker/

How to Create and Share a Google Document
https://docs.google.com/present/view?id=dfnmfqtd_752g96592dx